LMH6655MAX

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LMH6655MAX Application Field and Working Principle

The LMH6655MAX is a high-performance, wideband, audio-specific voltage-feedback op-amp designed for driving low-resistance headphones, speaker drivers and line-level loads. It has been designed to offer maximum performance and flexibility with minimal power consumption in applications, such as audio and acoustic instrumentation, automotive audio, portable medical devices, and general ADC/DAC and interface circuits. The LMH6655MAX is a suitable replacement for other audio amplifiers such as the LM4562 and LMH6646.

Linear - Amplifiers - Instrumentation, OP Amps and Buffer Amps

Instrumentation Amplifiers (IAs)

The LMH6655MAX is an integrated instrumentation amplifier (IA), which is an active differential amplifier with a high input impedance, or a high input resistance. This amplifier has integrated common-mode gain, which allows it to provide input offset voltage correction relative to power supply voltage, and significantly reduce the effect of system noise and offsets. This amplifier has a fast slewing rate (hence its wide bandwidth) and very low power consumption (5-milliwatt power dissipation).

The maximum level of performance of the LMH6655MAX is obtained when the operating temperature is between 0°C to 85°C. This amplifier does not require a minimum input voltage, allowing it to be used for high-sensitivity applications, such as acoustic instrumentation. The maximum output current capability of the amplifier is 3.2A.

Operational Amplifiers (Op Amps)

The LMH6655MAX is a high-performance, wide-band voltage-feedback op-amp. It is designed to provide excellent AC and DC performance over a wide range of applications. This op-amp has a very low offset voltage, low noise, high gain and fast settling time. It also has a ultra low power consumption and can operate up to a power supply voltage of ± 6.5V.

This op-amp can be used in systems (including portable and automotive audio systems) that require high input impedance, low power consumption and high gain. It is suitable for a wide range of applications such as ADC/DAC Interface, audio and acoustic instrumentation, portable medical devices and high input impedance transconductance amplifiers. The LMH6655MAX has a large selection of features and is highly configurable for various requirements.

Buffer Amps

The LMH6655MAX also functions as a buffer amplifier. It is designed to drive low resistance loads such as headphones, speaker drivers, touch panels and line-level loads. It has low output impedance and high slew rate (7 volts/ms), making it well-suited for audio applications that require low distortion and high dynamic range. The maximum output current capability of the amplifier is 3.2A.

The LMH6655MAX is a very power efficient buffer amplifier as it has a maximum power dissipation of 5 milliwatts. This makes it suitable for portable and automotive audio applications where power and size are limited. It is important to note that the LMH6655MAX is not a full Bridge or Proportional Drive Amplifier, so it is best used in systems that do not require a high level of output current.

In conclusion, The LMH6655MAX is a high-performance, wideband, audio-specific voltage-feedback op-amp that is suitable for driving low-resistance headphones, speaker drivers and line-level loads, as well as be used in a variety of voltage-feedback type audio and acoustic instrumentation applications. It is an extremely power efficient amplifier with a 5-milliwatt power dissipation, making it well-suited for portable and automotive audio applications.

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